<template>
  <div>
    <el-row type="flex" justify="end">
      <el-select
        v-model="currentYear"
        size="small"
        style="width: 120px"
        @change="dateChange"
      >
        <el-option
          v-for="item in yearList"
          :key="item"
          :label="item"
          :value="item"
          >{{ item }}</el-option
        >
      </el-select>
      <el-select
        v-model="currentMonth"
        size="small"
        style="width: 120px;margin-left:10px"
        @change="dateChange"
      >
        <el-option v-for="item in 12" :key="item" :label="item" :value="item">{{
          item
        }}</el-option>
      </el-select>
    </el-row>
    <el-calendar v-model="currentDate">
      <template v-slot:dateCell="{date, data}" class="content">
        <div class="date-content">
          <span class="text"> {{ data.day | getDay }}</span>
          <span v-if="isWeek(date)" class="rest">休</span>
        </div>
      </template>
    </el-calendar>
  </div>
</template>

<script lang="ts">
import { Component, Vue, Prop } from 'vue-property-decorator'

@Component({
  name: 'WorkCalendar',
  filters: {
    getDay(value: string) {
      const day = value.split('-')[2]
      return day.startsWith('0') ? day.substr(1) : day
    }
  }
})
export default class extends Vue {
  @Prop({ default: () => new Date() }) startDate!: Date

  currentMonth: number | null = null // 当前月份
  currentYear: number | null = null // 当前年份
  currentDate: number | Date | null = null
  yearList: number[] = []

  created() {
    //    处理起始时间
    // 组件要求起始时间必须是 周一开始 以一个月为开始
    this.currentMonth = this.startDate.getMonth() + 1
    this.currentYear = this.startDate.getFullYear()
    // 根据当前的年 生成可选年份 前后各加5年
    this.yearList = Array.from(
      Array(11),
      (value, index) => (this.currentYear as number) + index - 5
    )
    // 计算 当年当月的第一个周一 再加上 四周之后的一个月月份
    this.dateChange()
  }

  // 是否是休息日
  isWeek(value: Date) {
    return value.getDay() === 6 || value.getDay() === 0
  }

  // 年月份改变之后
  dateChange() {
    const year = this.currentYear
    const month = this.currentMonth
    this.currentDate = new Date(`${year}-${month}-1`) // 以当前月的1号为起始
  }
}
</script>

<style scoped>
/deep/ .el-calendar-day {
  height: auto;
}
/deep/ .el-calendar-table__row td,
/deep/ .el-calendar-table tr td:first-child,
/deep/ .el-calendar-table__row td.prev {
  border: none;
}
.date-content {
  height: 40px;
  text-align: center;
  line-height: 40px;
  font-size: 14px;
}
.date-content .rest {
  color: #fff;
  border-radius: 50%;
  background: rgb(250, 124, 77);
  width: 20px;
  height: 20px;
  line-height: 20px;
  display: inline-block;
  font-size: 12px;
  margin-left: 10px;
}
.date-content .text {
  width: 20px;
  height: 20px;
  line-height: 20px;
  display: inline-block;
}
/deep/ .el-calendar-table td.is-selected .text {
  background: #409eff;
  color: #fff;
  border-radius: 50%;
}
/deep/ .el-calendar__header {
  display: none;
}
</style>
